Hi anyone got any knowledge of these at all regarding sizeing
i was under the impression its either 90mm or 115mm which both seem to big
ive emailed them asking about one for a 3" tail pipe and he recommend this
http://www.wbperformance.com/store-p...8.html#reviews
which unless am totally thick or am i missing summit real obvous is 4 1/2"

Apreaite any help
Regards Blunt.RS